2010Final results
2010 election for California's 20th District
U.S. House · California
Jim Costa (D) won with 51.7% of the vote, defeating Andy Vidak (R) by 3.4 points.
Jim CostaDemocrat · winner
51.7%46,247
Andy VidakRepublican
48.3%43,197
89,444 votes
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET
The seat over time
D − R margin in this seat's races around 2010
Races before and after
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET
Money in this race
Each line compares the two campaigns on one scale.
Jim CostaAndy Vidak
$1.8M
Raised by the campaign
$900.6K
$2.1M
Spent by the campaign
$895K
$27.4K
Cash on hand
$5.7K
Campaign money: FEC, through Dec 31, 2010.
Source: FEC campaign filingsUpdated Dec 31, 2010